===================================================================
--- original.js
+++ change.js
@@ -109,16 +109,61 @@
 		piggies.push(piggy);
 		game.addChild(piggy);
 	}
 };
-var dragNode = null;
-game.down = function (x, y, obj) {
-	dragNode = player;
+// Define the direction of the player
+var direction = {
+	up: false,
+	down: false,
+	left: false,
+	right: false
 };
-game.up = function (x, y, obj) {
-	dragNode = null;
-	var bullet = new Bullet();
-	bullet.x = player.x;
-	bullet.y = player.y;
-	bullets.push(bullet);
-	game.addChild(bullet);
+// Listen to keydown event
+window.addEventListener('keydown', function (event) {
+	switch (event.key) {
+		case 'ArrowUp':
+			direction.up = true;
+			break;
+		case 'ArrowDown':
+			direction.down = true;
+			break;
+		case 'ArrowLeft':
+			direction.left = true;
+			break;
+		case 'ArrowRight':
+			direction.right = true;
+			break;
+	}
+});
+// Listen to keyup event
+window.addEventListener('keyup', function (event) {
+	switch (event.key) {
+		case 'ArrowUp':
+			direction.up = false;
+			break;
+		case 'ArrowDown':
+			direction.down = false;
+			break;
+		case 'ArrowLeft':
+			direction.left = false;
+			break;
+		case 'ArrowRight':
+			direction.right = false;
+			break;
+	}
+});
+game.update = function () {
+	// Player movement logic
+	if (direction.up) {
+		player.y -= player.speed;
+	}
+	if (direction.down) {
+		player.y += player.speed;
+	}
+	if (direction.left) {
+		player.x -= player.speed;
+	}
+	if (direction.right) {
+		player.x += player.speed;
+	}
+	// Rest of the game logic...
 };
\ No newline at end of file